now-cli.rb

require "language/node"

class NowCli < Formula
  desc "The command-line interface for realtime global deployments."
  homepage "https://zeit.co/now"
  url "https://github.com/zeit/now-cli/archive/7.0.2.tar.gz"
  sha256 "7924feb98f07a599cb9ffdabd07f95048864cf4fe15fdcbd2922b8cd8b32a8be"

  depends_on "node" => :build

  def install
    inreplace "package.json" do |s|
      s.gsub! /^.*"prepublish".*$/, '' # don't run prepublish
      s.gsub! /^.*"postinstall".*$/, '' # don't run postinstall
    end
    # replace update notice message
    # ToDo: Mabe disbale update notifier completly?
    inreplace "bin/now.js", "Please download binaries from https://zeit.co/download",
              "Please update with: brew upgrade now-cli"
    # Read the target node version from package.json
    target = IO.read("package.json").match(/\"(node\d+)-macos-x64\"/)[1]

    system "npm", "install", *Language::Node.local_npm_install_args

    # This packages now-cli together with a patched version of node (7 atm)
    # Said version of node is build from source in this install step
    # The homebrew provided node8 is only used as a build tool.
    pkg_args = %W[
      --config=package.json
      --output=packed/now
      --debug
      --build
      --targets=#{target}
    ]
    system "node_modules/.bin/pkg", "bin/now.js", *pkg_args

    # This is a 58MB big executable containing said patched node7 version + all JavaScript
    # sources of now-cli and dependencies packed into it.
    bin.install "packed/now"
  end

  test do
    system "#{bin}/now", "-v"
  end
end